INGREDIENTS
1
Egg, large
1 cup
Peanut butter, pure
1 3/4 cups
All-purpose flour
1/2 tsp
Baking powder
1/2 tsp
Baking soda
3/4 cup
Cocoa powder, Dutch process
1 cup
Granulated sugar
2 cups
Icing sugar
1/2 tsp
Salt
3 tsp
Vanilla
1 1/2 cups
Butter, unsalted
3/4 cup
Milk
1/2 cup
Sour cream, full-fat